Final answer:
Robin is an investor in Champs Tennis Gear Inc. by purchasing shares, which makes her a shareholder with partial ownership in the company. Shareholders in large firms often only own a small percentage of the overall company as stocks represent fractional ownership.
Step-by-step explanation:
Robin, who recently purchased 100 shares of stock in Champs Tennis Gear Inc., is a shareholder and thus is considered an investor in the company. When individuals like Robin buy stock in a company, they become part owners of that company to the extent of the shares they own. Stocks represent fractional ownership in the firm and shareholders are entitled to a share of the profits and have voting rights on certain company matters.
In the case of very large companies, such as IBM, AT&T, General Electric, and others, which have millions of shares of stock, no single shareholder typically owns a majority. This means that even investors holding thousands of shares will possess only a small percentage of the company.